![]() Most Acad commands are 'aliased' to one or two letter commands like 'L' for line, 'C' for circle, etc. For the most part I still use the keyboard for command entry. Back when I learned AutoCAD we were in the DOS world no 'buttons', just a command line interface. "I know exactly what I want to do finding the right button is the frustrating part."About all I can say, Grits, is that this takes practice. This is your, and my responsibility.Ĭan you be specific on what it is you're having problems with? The command set for your software my well be different from mine but the essential ingredients are none the less common across the board. Well, I guess there are examples in nature that would obviate that but for the purposes of this discussion, I don't believe computers, in the current condition at least, provide any input to the design process. ![]() Design is totally within the realm of human intelligence. There is no such thing as Computer Assisted Design in my humble yet closely held opinion. Another acronym is CADD - Computer Assisted Drafting and Design. This seemingly esoteric obsession is, to me, vital in creating a valid 2D or, as you progress in the CAD world, 3D model of your design.ĬAD is useful but remember, CAD is an acronym for Computer Assisted Drafting. This us usually a function called, in AutoCAD, object snap where the construction of a new line is begun by specifying that its start point is the end point of another line. Meaning that all lines and arcs are physically (in a metaphorical sense) connected to one another. There's the issue of what I'll call drawing integrity. There's much more, of course, but I'll try to keep this under 10k words. If you want to draw a line 5-3/8" long, "draw" it that long. Scale is meaningless until you need to produce hard copy output. I've worked on 200,000sf buildings that I could completely display on my screen or by zooming in, focus on a single element a few inches wide that still fills the screen. the computer's got it stored as a 1' line. A 1' line may appear much shorter than that on the screen but trust me. With CAD you're drawing FULL scale at all times. The only time that's relative is when you go to produce some hard copy output. Thus, forget about the confines of the edges of "paper". Finally after zooming in sufficiently one can read the plaque the lunar astronaughts placed there. Zooming in again a small dot becomes evident on the surface of the moon. Zooming in on a dot on that circle around earth, one discovers this is the moon. Zooming in on a little dot on the third circle revealed that this was planet earth, which had yet again another circle around it. When one inititally loaded the drawing file there were nine circles displayed on the screen. Older versions of AutoCAD used to come with a drawing called "solar.dwg" if I remember right. ![]() The computer screen represents but a portion of the available 'drafting surface' if you will. Second thing you need to come to grips with is that the computer's drafting board is not finite as with a sheet of paper. All lines, arcs, circles, etc., are, or can be relative to that point. The "origin" of the coordinate system is where the two meet. If you're not familiar with a cartesian (x/y) coordinate system, picture in your mind a framing square with both blade and tongue infinitely long. Again, that's in all CAD systems I've experienced. All 'objects' in a CAD drawing are created relative to this coordinate system. ![]() The first thing you have to know and understand is what this implies. Suffice it to say, almost any CAD software I *have* had experience with relies on a cartesian coordinate system. OK, I don't have TurboCAD and thus I'm not familiar with the command set. One could get more philosophical and say there are only arcs, where lines are special cases of arcs of infinite radius. There are only two kinds of basic two dimensional 'primitives' with respect to CAD drafting: lines and arcs. I was also trained as a paper (wood drawing board) drafter - by way of credentials. I'm a long time CAD user by way of credentials.
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